I have a pae kernel but
free -m only shows 3.2 Gigs of the 4 GB that is physically installed. The BIOS shows 4 GB available.
uname -a gives:
3.2.0-35-generic-pae #55-Ubuntu SMP Wed Dec 5 18:04:39 UTC 2012 i686 athlon i386 GNU/Linux
So it is 32-bit but as I say pae. Running Ubuntu 12.04.
Anybody any idea why it can't see the full 4GB?